package com.can.lesson01.utils;


import org.apache.commons.dbcp.BasicDataSourceFactory;

import javax.sql.DataSource;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;

public class poolUtil_DBCP {

    private static DataSource dataSource =  null;
//    private static BasicDataSource dataSource =  null;

    static{
        try {
            InputStream in = poolUtil_DBCP.class.getClassLoader().getResourceAsStream("dbcpconfig.properties");
            Properties properties = new Properties();
            properties.load(in);

            //创建数据源 工厂模式-->创建
            dataSource = BasicDataSourceFactory.createDataSource(properties);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //获取连接
    public static Connection getConnection() throws SQLException {
        return dataSource.getConnection(); //从数据源中获取连接
    }

    //释放资源
    public static void release(Connection conn, Statement st, ResultSet rs){
        if (conn!=null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (rs!=null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (st!=null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

}
